Spontaneous Reaction Video Lessons

Concept

# Problem: Consider the reaction between nitrogen and oxygen gas to form dinitrogen monoxide: 2 N2(g) + O2(g)  →  2 N2O(g), ΔHrxn = + 163.2 kJDetermine the sign of the entropy change for the universe. Is the reaction spontaneous?

###### FREE Expert Solution

$\overline{){\mathbf{∆}}{{\mathbf{S}}}_{{\mathbf{univ}}}{\mathbf{=}}{\mathbf{∆}}{{\mathbf{S}}}_{{\mathbf{sys}}}{\mathbf{+}}{\mathbf{∆}}{{\mathbf{S}}}_{{\mathbf{surr}}}}$

Step 1Determine ΔSsurr:

163,200 J/mol

T = °C + 273.15 = 25 + 273.15 = 298.15 K

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###### Problem Details

Consider the reaction between nitrogen and oxygen gas to form dinitrogen monoxide: 2 N2(g) + O2(g)  →  2 N2O(g), ΔHrxn = + 163.2 kJ

Determine the sign of the entropy change for the universe. Is the reaction spontaneous?